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CMA’s Satellite-based Data Services

CMA's domestic communication networks provide satellite-based data services, including PCVSAT broadcast, DVB-S broadcast, and FENYUNCast. These networks cover a wide area, with 2300 county-level centers, 31 provincial centers, and 300 city-level centers. The services include data dissemination, two-way communication, and backup solutions.

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CMA’s Satellite-based Data Services

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  1. CMA’s Satellite-based Data Services NMIC, CMA

  2. Outline • CMA’s domestic communication networks • CMA’s data dissemination services • CMA PCVSAT broadcast • CMA DVB-S broadcast • FENYUNCast

  3. CMA’s Domestic Communication Networks NMIC Broadband network VSAT-based broadcasting system Two-way VSAT system County level centers 2300 Provincial centers 31 City level centers 300

  4. VSAT-based two-ways systemAsiaSat 2, Ku band • 1 hub station, 330 remote station Data Communicaton: • 1 outbound channel, 512kbps • 12 inbound channels, including 8*128kbps operational channel, and 4*64Kbps backup channel Backup to the broadband network: collecting observations and products from local weather centers to NMIC

  5. VSAT-based broadcasting system • Disseminating data and products from national center (NMIC) to local weather centers, as well as some neighboring countries • CMA’s data dissemination services • CMA PCVSAT broadcast • CMA DVB-S broadcast • FENGYUNCast

  6. CMA PCVSAT broadcast Operational since 2000 Bandwidth 2Mbps 256 logical channels，typical channel rate 64Kbps Priority based broadcast: Emergency messages sent out immediately 2600 receiving stations, including 5 in neighboring countries: Pyongyang, Ulan Bator, Hanoi, Yangon, Dhaka Daily broadcasting data volume: 2.8Gbytes.

  7. AsiaSat 2 (100.5E) C&Ku-band converage

  8. CMA DVB-S broadcast • Upgrading System for PCVSAT • Same satellite and transponder • Operational since April 2006 • 350 receiving stations • Cheaper receiving system: DVB-S based • Priority based broadcast: Emergency messages sent out immediately • Total data rate: 8Mbps, daily broadcast data volume 25GB, + 2 MPEG-4 video streams • New data service since 2007: Near real-time dissemination of FY-2C/D satellite images every 15 minutes to local weather centers

  9. Data distributed over PCVSAT and DVB-S • Observations SYNOP, TEMP, PILOT, SHIP, BATHY, BUOY, CLIMAT, CLIMAT TEMP, AIREP, AMDAR, TRACKOB, TESAC, WAVEOB, SATEM, SARAD, SATOB …… • Warnings • Model products • Radar data and products • Satellite data and products • etc…… • PCVSAT: 2.8GB/day • DVB-S: 25GB/day

  10. FENGYUNCast • CMA’s contribution to GEONETCast • Provides an effective way to disseminate different kinds of satellites data in a unified platform. • Advanced features: • Near real-time data collection, • Automatic data broadcasting, • Centralized user information management, • Cheap and industrial standardized user terminal, • etc……

  11. CMA DVB-S User Terminal Hardware Configuration User Terminal: Receiving Station

  12. Wider Coverage for Asia/pacific region Countries! Asiasat-4 C-band EIRP Coverage

  13. Data distributed over FENGYUNCast • Satellite data and products • FY-2C, FY-2D • FY-1D • NOAA/AVHRR • MODIS(TERRA、AUQA）

  14. 130 FENGYUNCast receiving stations in China

  15. FENGYUNCast receiving stations in 18 countries • In 2006, 7 receiving stations • Bangladesh, Indonesia, Iran, Mongolia, Pakistan, Thailand, Peru • In 2007, 11 receiving stations • DPRK, Kyrghyz, Lao P.D.R, Malaysia, Myanmar, Nepal, Philippines, Sri Lanka, Tajikistan, Uzbekistan, and Viet Nam

  16. Data exchange with EUMETCAST

  17. Consolidation of broadcast systems • An integrated broadcast catalogue containing both conventional and satellite data and products, supporting WIS data dissemination • Transmission in both Ku and C band – Ku: smaller antenna dish – C: bigger footprint (better coverage outside China), and not affected by heavy rain • Enhanced user management and support

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